Sprocket wheel and chain.



No. 868,615. -YPATENTED 001215, 19ov.

R. s. MOINTYRB.

SPROCKBT WHEEL AND CHAIN. `ILPPLIOATIOH lFILED rma. 9,v 19o?.

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'UN [TED STATES ROBERT SAFFORI) MCINTYRE, OF RIVERSIDE, CALIFORNIA.

SPROCKET WHEEL AND i CHAIN.

Specification of Letters Patent.

Patented Oct. 15, 1907.

Original application filed February 23, 1905, Serial No. 246,891. Divided and this application iiled February 9, 1907. Serial No. 356.569.

To el] /Ilrhom it may concern.'

le it known that. I, ROBERT Sarnonn MCINTYRE, a citizen ol' the United States, and a resident oi' Riverside, in the county ol Riverside and State oi California. have invented a new and Improved Sprocket Wheel and (Ih-ain, ol which the following is a full, clear, and exact description.

This invention relates to sprocket wheels and chains such as used in the driving gear oi automobiles or in the transmission `mechanism ol machinery.

The present application is a division of an application liled by me February 23, 1905, Serial Number 246,891, under the title ol Automobile driving gear.

The object ol the invention is to produce a sprocket Wheel and chain which will operate eiiiciently to transmit a rotary movement, and, further, to provide a construction which will insure that the chain will not become displaced from the wheel.

The invention consists in the construction and combination ol' parts to he more fully described hereinafter and particularly sel forth in the claims.

Rcl'erence is to be had to the -accompanying drawings loi-ming a part of this specication, in which similar characters ot' reference indicate corresponding parts in all the lgurcs.

Figure l is a side elevation of a sprocket Wheel constructed accordingl 1.o my invention, and representing the same as applied to the wheel of a vehicle. A portion ol' the sprocket chain is represented in connection with the wheel', Fig. 2 is a cross section through the sprocket. wheel and chain taken in a radial plane and illustrating a portion of one oi' the spokes to which the sprocket wheel is attached; Fig` 3 is a side elevation el a portion oi' thcl sprocket chain; and Fig. 4 is a plan or edge view ol omI ol the segments out oi which the sprocket wheel is termed.

Referring more particularly to the parts, 1 represents a Wheel such found in vehicles, the same being provided with spokes i radiating from the hub 3. Upon the spokes 2 I attach the sprocket wheel 4. This V sprocket wheel is l'ormed oi' a plurality of segments 5 to lorm projecting tongues 8 and 9. The tongue 8 at one end of each segment is disposed at one side, While the tongue 9 at the opposite end of the same segment is disposed on the opposite side. With this arrangement, the segments may be iitted together so that the tongues 9 overlap the tongues 8. The segments are then rigidly attached to the tongues 8 and 9 by means oi through bolts 10 as indicated. In this way a very Hrm and rigid sprocket wheel is built up.

In order to attach the sprocket wheel rigidly to the Wheel I, the segments 5 are provided on their inner sides with inwardly projecting posts 1l, the inner ends whereof are formed with concave faces' l2 or sockets which are adapted to be applied to the round spokes 2, as indicated most clearly in Fig. 2. At the posts 11 I provide U-bolts 13 which pass around the ends of the posts and enable the posts to be clamped upon the spokes by means oi suitable nuts 14. These U-bolts pass throughimvardly projecting wings 15 which extend inwardly toward the center of the wheel from the inner sides of the segments, as shown very clearly in Figs. l. and 2.

The posts 11 are preferably formed on the side faces ot the wings I5. The sprocket chain 16 is formed of iour rungs or belts, there being two inside or guide belts 17 and two outside or transmission belts 18. These belts are formed of links having the same length and having the same pivot pins 19. The belts 17 are not continuous, but are formed simply oi plates or sections 20 which are disposed opposite alternate links 21 in the transmission belts I8. These plates 20 are oi substantially rectangular form and project downwardly into the groove 7. Their lower edges are beveled on the outer side so as to coniorm to the shape 0i the groove 7, as indicated in Fig. 2. On the inner edges of the links of the belts 18, sprocket teeth 22 are formed which are adapted to engage with the sprocket teeth 6' ol the sprocket wheel in a well understood manner. With this arrangement, `it should be understood that the chain will operate effectively to transmit a rotary movement to the sprocket wheel. At the saine time, the links or plates 20 which project into the groove 7, effectively prevent any possibility of the chains being disconnected from the sprocket wheel by a lateral movement.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A sprocket wheel having separated rows of teeth with a circumferential groove formed therebetween, in

pivot pins and projecting into said groove to prevent the 10 dislocation of said chain.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT SAFFORD MCINTYRE.

Witnesses LAFAYETTE GILL, FRANCES RAILSBACK. 

